[Paraview-developers] Missing vtkTemporalDataSet class in ParaView 3.98.0

[Sunrise]

Hi again,

Regarding the recent changes in UPDATE_TIME_STEP(S) key and replacement
for vtkTemporalDataSet, I have two questions:

 1. In vtkMultiblockDataSet, what is the difference between
    GetChild(index) and GetBlock(index)?
    I will probably use iterators anyway, but both these methods seems
    the same. Right?
    Are indices in both methods the same? Do they both use flat_index in
    data tree?

 2. So, I changed all UPDATE_TIME_STEPS() key to UPDATE_TIME_STEP().
    Here is the problem now:
    The old key (UPDATE_TIME_STEPS) is a vtkInformationDoubleVectorKey,
    while the new key (UPDATE_TIME_STEP) is vtkInformationDoubleKey,
    which only holds one time step (a number). Whereas, I need a vector
    of numbers, each of which represents time step of it's corresponding
    dataset (each individual leaf in blockdataset). I will send this key
    over the pipeline with BlockDataSet, so the downstream filter(s)
    knows the input block dataset contains what time frames. How should
    I use "vector" time data with vtkStreamingDemandDrivenPipeline?

Any suggestions would be appreciated.


On 01/10/2013 03:35 PM, Yuanxin Liu wrote:
> Hi,
>   We will not continue to support it.  In fact, the current development
> branch does not have the class anymore.
>
>   Yes, you can use vtkMultiTimeStepAlgorithm if you do not want to manually
> loop over all the time steps to construct a composite data set.
>
>   You should replace vtkTemporalDataSet by vtkMultiBlockDataSet.  Replacing
> calls to vtkTemporalDataSet by calls to vtkMultiBlockDataSet should be
> fairly straightforward. You can look at the old vtkTemporalDataSet.h to see
> what to do.  For example,
> -   data->GetTimeStep(timeStep)  can be replaced
> by  data->GetChild(timestep);
> -   data->GetMetaData(timestep) can be replaced by
>  data->GetChildMetaData(timestep);
>
> Leo
>
>
>
> On Thu, Jan 10, 2013 at 4:02 PM, Sunrise <helios.corona at gmail.com> wrote:
>
>>  Thanks for the quick reply, Leo.
>>
>> I prefer to have a class that acts like a container of data frames. I
>> already use the keys that you have mentioned for looping over pipeline, in
>> order to do operations "on temporal data set". I mean, the TemporalDataSets
>> are sending back and forth over pipeline. Having a class (like
>> vtktemporalDataSet) that acts like "container" of data would be much easier
>> to avoid nested loops in my case.
>>
>> Do you have any suggestion for a data container class such as alternative
>> to vtkTemporalDataSet class? Is deriving from vtkMultiTimeStepAlgorithm
>> suitable to create such container class?
>>
>> Next, I see vtkTemporalDataSet is still in vtk. Does it mean vtk (well not
>> ParaView) continue to support it?
>>
>> Again, Thanks.
>>
>>
>> On 01/09/2013 08:50 PM, Yuanxin Liu wrote:
>>
>> Hi,
>>   This is because vtkTemporalDataSet is no longer supported.  The details
>> of the change can be seen here:
>> http://www.vtk.org/Wiki/VTK/Remove_vtkTemporalDataSet.    In short, the
>> executives now only support updating single time steps; if a filter needs
>> to use multiple time step data, it needs to use the key
>> vtkStreamingDemandPipeline::CONTINUE_EXECUTION() to loop over those time
>> steps.
>>
>>    If your filter works only on single time steps, then the change should
>> be fairly straightforward.  Try:
>>  - Inherit from vtkDataObjectAlgorithm instead of
>> vtkTemporalDataSetAlgorithm
>>   - replace the key UPDATE_TIME_STEPS() by UPDATE_TIME_STEP()
>>  - replace the key DATA_TIME_STEPS() by DATA_TIME_STEP()
>>
>>    The compiler would then hopefully guide you to resolve the rest of the
>> errors.  Let me know if you have trouble.  Also please feel free to post
>> your code.
>>
>>  Leo
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Wed, Jan 9, 2013 at 9:00 PM, Sunrise <helios.corona at gmail.com> wrote:
>>
>>> Hello everyone,
>>>
>>> I am compiling ParaView developement in order to develop a ParaView
>>> plugin. Some of my classes are inherited from vtkTemporalDataSetAlgorithm.
>>> In previous version(s) of ParaView source code (i.e. <= 3.14.1) I could use
>>> vtkTemporalDataSetAlgorithm and I everything was fine.
>>>
>>> Recently I tried to use newer version of ParaView source (version 3.98.0)
>>> and some vtk files are missed, such as:
>>>
>>> .../Filtering/vtkTemporalDataSetAlgorithm.cxx
>>> .../Filtering/vtkTemporalDataSet.cxx
>>> .../Filtering/vtkTemporalDataSetAlgorithm.h
>>> .../Filtering/vtkTemporalDataSet.h
>>>
>>> How can I use vtkTemporalDataSet* in recent ParaView?
>>>
>>> Thanks.
>>> _______________________________________________
>>> Paraview-developers mailing list
>>> Paraview-developers at paraview.org
>>> http://public.kitware.com/mailman/listinfo/paraview-developers
>>>
>>
>>

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